Factors Influencing Stored-oat Insect Populations in South Dakota
Authors: Ingemansen, J. A.; Reeves, D. L.; Walstrom, R. J.
Source: Journal of Economic Entomology, Volume 79, Number 2, April 1986 , pp. 518-522(5)
Publisher: Entomological Society of America
Abstract:Factors related to insect population fluctuations in stored oats were identified in a 2-year study.Oryzaephilus surinamensis (L.), Cryptolestes spp., and Tribolium castaneum (Herbst) were the predominant pests of stored oats and their population levels remained constant from 8 to 11% moisture. At moisture levels >11%, average insect density increased with increased moisture. High densities of O. surinamensis were found at moisture levels <12%, while highest densities of Cryptolestes spp. were found at moisture levels >13%. Average insect density levels peaked in November 1982 and again in September 1983. The incidence of live insects peaked at 74% in October 1982, while in September 1983 population levels peaked at 84%. The type of bin construction showed significant differences in insect density levels. Oats stored in flat storage and oats in large steel bins had significantly higher average insect density levels than oats stored in wooden bins. As bin size increased, the average insect density also increased. False or steel floors were found to have higher average insect density levels. Bins cleaned with a vacuum cleaner before filling had significantly lower average insect density levels than those cleaned with a scoop shovel or broom.
Document Type: Research article
Publication date: 1986-04-01
- Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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